America is a less Christian nation than it was 20 years ago, and Christianity is not losing out to other religions, but primarily to a rejection of religion altogether, a survey published Monday found. Link

In searching for this poll I'm having a bit of trouble. Perhaps it's this one done by the Pew Forum called U.S. Religious Landscape Survey. See what you think. One conclusion is that it's more socially acceptable than ever to admit having no religion.